The Combustible Materials Remote Sensing Ration Calculation and Fire Risk Dynamic Monitor in the Seasons of Withered Grass in Xilingoule Grassland

Abstract

The amount of combustible material is the primary factor which influences the occurrence and developing of fire. From analyzing the field survey data during the six months of the whole seasons of withered grass in Xilinguole, we obtained the different types grassland dynamic changing rates, which include the meadow steppe, steppe and desert steppe. On this basic, we estimated the amount of combustible material in each month by MODIS. So we realized the big quality and fast dynamic monitoring of combustible stock in seasons of withered grass from prairie. Using many factors data : the meteorological drought index(SPI), the combustible stock, vegetation continuous and snow conditions , return fire risk index , which apply the important parameter for the alarming of prairie fire.